i must admit, i sit on the 'its bs' side of things.
I dont believe there is anyone who can talk/tune/feel the dead as i believe once you die your gone, thats it, finished.
Having said this though, i did experience something that did/does sometimes make me wonder.
my mum was an art teacher she died when i was 8.....around 6 or 7 years later i was on a trip to france, sitting on the bus talking about the trip, when a mate of mine (who had never met my mum, or knew anything about her) said 'oh, we could go visit that red village your mum liked'
I told him honestly (or so i thought ) that my mum had never been to france and that he didnt even meet her, i didnt used to talk about her much either.
After my week away, i got home and told me old man, and he showed me a photo of a drawing my mum did of collonges la rouge in france!!
Aparrently before meeting my old man, way before i was born she spent some time there drawing...
It could have course been a coinsidence, and my mate didnt know why he said it, so i chalk it down to just being a bit strange!